RTC_ADOM
rtc->rtc_adom = BCD_TO_BYTE(BQ4802_DATA_REG(RTC_ADOM));
BQ4802_DATA_REG(RTC_ADOM) = BYTE_TO_BCD(rtc->rtc_adom);
DS1287_ADDR_REG = RTC_ADOM;
DS1287_ADDR_REG = RTC_ADOM;
rtc->rtc_adom = (M5819P_DATA_REG) & RTC_ADOM;